23145123449 has 16 divisors (see below), whose sum is σ = 27172675200. Its totient is φ = 19298093184.

The previous prime is 23145123427. The next prime is 23145123481. The reversal of 23145123449 is 94432154132.

It is a cyclic number.

It is not a de Polignac number, because 23145123449 - 2¹⁶ = 23145057913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23145123949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1645157 + ... + 1659165.

It is an arithmetic number, because the mean of its divisors is an integer number (1698292200).

Almost surely, 2^23145123449 is an apocalyptic number.

It is an amenable number.

23145123449 is a deficient number, since it is larger than the sum of its proper divisors (4027551751).

23145123449 is a wasteful number, since it uses less digits than its factorization.

23145123449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20432.

The product of its digits is 103680, while the sum is 38.

The spelling of 23145123449 in words is "twenty-three billion, one hundred forty-five million, one hundred twenty-three thousand, four hundred forty-nine".